We hear it from the grizzled veteran pilot who has been flying since he lived next door to Wilbur and Orville Wright. We get the same question from guys who have so little experience with electricity they think that Watts is just a neighborhood in L.A.

So what does the C rating on a lipo mean?
For starters, the C in C Rating
stands for capacity. To break it down to its simplest terms, the C rating is the maximum safe continuous discharge rate of a pack. If you see 10C on your battery, it means it can be discharged at 10 times that pack's capacity. Capacity refers to the milliamp-hour rating of the battery, which will be listed as a number followed by mAh (2000mAh, for example).

Here's the easy way to find your battery's discharge rate just multiply the number from the C rating by the pack's capacity. Keep in mind that 1000 milliamps
equals one amp. Here's an example, using an 11.1V 2000mAh 10C

This means that you can safely draw up to 20 amps continuously from that 11.1V 2000mAh 10C without doing damage to your battery.
Our packs have all the discharge
information printed right on the
label. You can check out one of our labels
right here. We hope this
helps clarify the most misunderstood
aspect of electric flight.